syzkaller login: [ 28.776450] BUG: Bad rss-counter state mm:000000000f5bf5bf type:MM_FILEPAGES val:33 [ 28.777908] BUG: Bad rss-counter state mm:000000000f5bf5bf type:MM_ANONPAGES val:22 [ 28.817710] ================================================================== [ 28.818625] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.819694] Read of size 8 at addr ffff88800dd7f798 by task sshd/221 [ 28.820635] [ 28.820841] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.821748] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.822644] Call Trace: [ 28.822947] [ 28.823348] dump_stack_lvl+0x91/0xf0 [ 28.823830] print_report+0xcc/0x620 [ 28.824273] ? __virt_addr_valid+0x102/0x340 [ 28.824781] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.825347] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.826020] kasan_report+0xbe/0xf0 [ 28.826541] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.827126] vma_interval_tree_remove+0xc75/0xec0 [ 28.827869] vma_prepare+0xc54/0x11a0 [ 28.828460] __split_vma+0x5af/0x950 [ 28.829029] ? __pfx___split_vma+0x10/0x10 [ 28.829532] ? find_held_lock+0x2c/0x110 [ 28.830103] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.830682] ? lock_is_held_type+0x9f/0x120 [ 28.831302] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.832075] ? mtree_range_walk+0x632/0x900 [ 28.832731] ? mas_walk+0x5c7/0x7c0 [ 28.833179] do_vmi_munmap+0x1f1/0x2b0 [ 28.833646] mmap_region+0x1f9/0x2660 [ 28.834100] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.834588] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.835261] ? __pfx_lock_acquire+0x10/0x10 [ 28.835755] ? __pfx_mmap_region+0x10/0x10 [ 28.836248] ? security_mmap_addr+0x7d/0xa0 [ 28.836760] ? get_unmapped_area+0x1f5/0x3f0 [ 28.837275] do_mmap+0x854/0xf00 [ 28.837690] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.838152] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.838683] ksys_mmap_pgoff+0x3af/0x500 [ 28.839178] do_syscall_64+0x3f/0x90 [ 28.839632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.840244] RIP: 0033:0x7f9e9fd5cd82 [ 28.840668] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 28.842714] RSP: 002b:00007ffcd4d0ae88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.843592] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9e9fd5cd82 [ 28.844390] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9e9f196000 [ 28.845192] RBP: 00007f9e9f196000 R08: 0000000000000009 R09: 0000000000001000 [ 28.845983] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f76d075d90 [ 28.846787] R13: 00007ffcd4d0aea0 R14: 00007ffcd4d0aed0 R15: 00007ffcd4d0b230 [ 28.847620] [ 28.847891] [ 28.848094] Allocated by task 214: [ 28.848500] kasan_save_stack+0x22/0x50 [ 28.848971] kasan_set_track+0x25/0x30 [ 28.849441] __kasan_slab_alloc+0x59/0x70 [ 28.849950] kmem_cache_alloc+0x16b/0x370 [ 28.850445] vm_area_dup+0x20/0x160 [ 28.850869] __split_vma+0x170/0x950 [ 28.851321] split_vma+0xc6/0x110 [ 28.851740] mprotect_fixup+0x8d2/0xb30 [ 28.852215] do_mprotect_pkey+0x87e/0xd40 [ 28.852708] __x64_sys_mprotect+0x78/0xc0 [ 28.853199] do_syscall_64+0x3f/0x90 [ 28.853659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.854285] [ 28.854483] Freed by task 214: [ 28.854850] kasan_save_stack+0x22/0x50 [ 28.855334] kasan_set_track+0x25/0x30 [ 28.855800] kasan_save_free_info+0x2b/0x50 [ 28.856314] __kasan_slab_free+0x10a/0x190 [ 28.856828] kmem_cache_free+0x10d/0x4d0 [ 28.857314] rcu_core+0x8c8/0x2860 [ 28.857735] __do_softirq+0x1b7/0x7d4 [ 28.858182] [ 28.858390] Last potentially related work creation: [ 28.858943] kasan_save_stack+0x22/0x50 [ 28.859444] __kasan_record_aux_stack+0x8e/0xa0 [ 28.859982] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.860591] remove_vma+0x139/0x170 [ 28.861019] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.861552] do_vmi_munmap+0x1f1/0x2b0 [ 28.862007] __vm_munmap+0x138/0x3a0 [ 28.862446] __x64_sys_munmap+0x59/0x80 [ 28.863010] do_syscall_64+0x3f/0x90 [ 28.863460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.864062] [ 28.864269] Second to last potentially related work creation: [ 28.864913] kasan_save_stack+0x22/0x50 [ 28.865395] __kasan_record_aux_stack+0x8e/0xa0 [ 28.865935] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.866567] remove_vma+0x139/0x170 [ 28.867001] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.867531] do_vmi_munmap+0x1f1/0x2b0 [ 28.867985] mmap_region+0x1f9/0x2660 [ 28.868440] do_mmap+0x854/0xf00 [ 28.868844] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.869305] ksys_mmap_pgoff+0x3af/0x500 [ 28.869780] do_syscall_64+0x3f/0x90 [ 28.870235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.870841] [ 28.871062] The buggy address belongs to the object at ffff88800dd7f740 [ 28.871062] which belongs to the cache vm_area_struct of size 168 [ 28.872466] The buggy address is located 88 bytes inside of [ 28.872466] freed 168-byte region [ffff88800dd7f740, ffff88800dd7f7e8) [ 28.873805] [ 28.874006] The buggy address belongs to the physical page: [ 28.874630] page:000000008bc53c0d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd7f [ 28.875680] memcg:ffff88800de07001 [ 28.876080] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.876743] page_type: 0xffffffff() [ 28.877171] raw: 0100000000000200 ffff8880087a0c80 ffffea0000358000 dead000000000003 [ 28.878052] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de07001 [ 28.878907] page dumped because: kasan: bad access detected [ 28.879539] [ 28.879743] Memory state around the buggy address: [ 28.880295] ffff88800dd7f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.881110] ffff88800dd7f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 28.881934] >ffff88800dd7f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 28.882750] ^ [ 28.883238] ffff88800dd7f800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 28.884056] ffff88800dd7f880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 28.884868] ================================================================== [ 28.885785] Disabling lock debugging due to kernel taint [ 30.797631] BUG: Bad rss-counter state mm:00000000eda80c94 type:MM_FILEPAGES val:33 [ 30.799078] BUG: Bad rss-counter state mm:00000000eda80c94 type:MM_ANONPAGES val:22 [ 31.367343] BUG: Bad rss-counter state mm:00000000b08df403 type:MM_FILEPAGES val:33 [ 31.368494] BUG: Bad rss-counter state mm:00000000b08df403 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7373' (ECDSA) to the list of known hosts. 2023/06/21 06:00:57 fuzzer started 2023/06/21 06:00:57 dialing manager at localhost:36067 2023/06/21 06:00:57 checking machine... 2023/06/21 06:00:57 checking revisions... [ 32.052609] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:00:57 testing simple program... [ 32.094618] cgroup: Unknown subsys name 'net' [ 32.135891] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:00:57 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff8880158d7cd8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff88800cf00498 R15=0000000000000000 RIP=ffffffff8135b982 RFL=00000282 [--S----] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6fa1227900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f6fa17df0b0 CR3=000000000eebe000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb5283 RBX=ffffffff85da9418 RCX=ffffffff81288ac4 RDX=0000000000000000 RSI=ffffffff860b9c62 RDI=ffffffff85da9400 RBP=ffffffff85da9414 RSP=ffff88806cf09998 R8 =ffffffff860b9c62 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000000ba8f R12=ffffffff85da9420 R13=ffffffff85da9400 R14=ffffffff85da9410 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f102c6d49f0 CR3=000000000ca1a000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=6471ae04d41fa29b0c40adba195c465c XMM02=ec2efd57dc4c00df000000000011ada8 XMM03=bb88559e919388ad000000000011ae78 XMM04=cc2d003f2e7462f400000000000ae988 XMM05=c8e923fa1df4f82b0000000000133a88 XMM06=c291bd5c70af25b90000000000132b28 XMM07=e042d86d42eb936e0000000000121da0 XMM08=bb88559e919388ad000000000011ae78 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000